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參數資料
| 型號： | HT82K28A |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Win98 Keyboard Encoder |
| 中文描述： | Win98鍵盤編碼器 |
| 文件頁數： | 7/20頁 |
| 文件大小： | 143K |
| 代理商： | HT82K28A |
HT82K28A
7
February 16, 2000
Resend
FE
Send the last code to the system
Note: * No FA response
Reset
Disable keyboard
Send an ACK to the system, the keyboard
acknowledges the command with an ACK
and ensures the system accepts the ACK be-
fore executing the command
The system sets CLK=DATA=high for
500 s: acceptance of ACK
The system can issue any command to the
KB within the 500 s period mentioned
above to override FF
If no override, the system performs its BAT
and enters mode 2 (even if it is set to be
mode 3)
FF
Select alternate scan code
Send an ACK to the system
Clears both output buffer and the typematic
key
Accept option byte
F0
Set all keys
FA: Set all keys to typematic/make/break
F9: Set all keys to make
F8: Set all keys to make/break
F7: Set all keys to typematic
Send an ACK to the system
Clear output buffer
Set all keys to the type indicated by the com-
mand
F7, F8, F9, FA
Set default
Send an ACK to the system
Clear the output buffer
Set to default key states: Default key type
typematic rate/delay
F6
Set key type
FB : Set key type
FC : Set key type
FB,FC,FD
Typematic
Make/Break
FD : Set key type
The keyboard responds with ACK, clears its
output buffer and prepares to receive key
identification
Key identification is accomplished by the
system identifying each key by its scan code
value as defined in scan code set3.
Only scan code set3 values are valid for key
identification
The type of each identified key is set to the
value indicated by the command
These commands can be sent using any
scan code set, but affect only the operation
of scan code set3
Make
Set LED
Send ACK to the system
Discontinue scanning
Wait for the option from the system
Respond with ACK to the system
Set indicator
If command comes from the system in place
of option, discard the set LED function and
then process the new command
LED default after power on - all off
Setdefaultdisable-donotchangetheLEDs
ED
Set typematic rate/delay
Send an ACK to the system
Stop scanning
Wait for the system typematic rate and de-
lay
Send an ACK to the system
Set rate/delay
Bit 6,5 delay
Bit 4,3,2,1,0 typematic rate
Bit 7=0 (always)
Delay= (1+bit6,bit5)
Typematic rate= 1/period
...where period= (8+A)
...where A= binary value of bit 2, 1 and 0
...where B= binary value of bit 4 and 3
F3
250ms
(2^B)
0.00417
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HT82K28A_02 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Win98 Keyboard Encoder |
| HT82K628 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Windows 2000 Keyboard Encoder |
| HT82K628A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Windows 2000 Keyboard Encoder |
| HT82K628A(40DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Controller Miscellaneous - Datasheet Reference |
| HT82K628A-40DIPLF | 制造商:Holtek Semiconductor Inc 功能描述:IC WIN 2000 KB PS2 CONT DIP40 制造商:Holtek Semiconductor Inc 功能描述:IC, WIN 2000 KB PS2 CONT, DIP40 制造商:Holtek Semiconductor Inc 功能描述:IC, WIN 2000 KB PS2 CONT, DIP40, IC Function:Keyboard Encoder, Brief Features:Su 制造商:Holtek Semiconductor Inc 功能描述:IC, PS/2 KEYBOARD ENCODER, DIP-40, IC Function:Keyboard Encoder, Brief Features:Supports Japanese, Korean, Brazilian and European, RC Oscillator, Phantom Key Detection, Supply Voltage Min:3V, Supply Voltage Max:5.25V, No. of Pins:40 , RoHS Compliant: Yes |
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